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R. S. BELISLE. ALARM MEGHANISM POR RAILWAY SWlTGHEs. No. 338,915. Patented Mar. 30, 1886.

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UNITED STATES PATENT OFFICE.

ROBERT S. BELISLE, OF PHILADELPHIA, PA., ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, OF PART TO THOMAS OTT, CHARLES D. FREEMAN, HENRY A. DUHRING, AND PAUL SCULL, ALL OF SAME PLACE.

ALARM MECHANISM FOR RAILWAY-SWITCHES.

SPECIFICATION forming part of Letters Patent No. 338,915, dated March 30, 1886.

Application filed January 1B, 1F86. Serial No.18,938. (No model.)

To all whom it may concern: by him at any time, in order to sound the Be it known that I, ROBERT S. BELIsLE, a whistle and assure himself that it is in proper citizen of the United States, and a resident of working condition. The other arm, f, of the Philadelphia, Pennsylvania, have invented valve projects downward and is in line with 5 certain Improvements in Alarm Mechanism pivoted toes h, hung to suitable bearings on the 55 for Railway-Switches, of which the following road-bed and located at a proper distance on is a specification. opposite sides of the switch, each toe being My invention consists of improvements in connected by a rod, t', to a bell-crank lever, m, devices whereby an alarm-whistle is sounded and these levers being connected by rods n to Io upon a locomotive approaching an open or two of the arms ofa diamond-shaped or three- 6o misplaced switch in time to permit the stoparmed lever, p, the third arm of which is conping of the engine and train before reaching nected to the switch-operating rod s. When said switch. the switch-rails are set in line with the main My improvements consist of certain details track, and said main track is consequently in the construction of the alarm and alarmclear, the pivoted toes h occupy the depressed 65 operating mechanism, as fully set forth hereinposition shown in Fig. 2, and are out of the after. y path of the armf of the valve d ou a locomo- In the accompanying drawings, Figure l. is tive traversing the track; but when the switcha plan view of sufficient of a railway-switch rails are moved so as to be in line with the 2o to illustrate the construction and application siding, and the continuity of the main track is 7o of the alarm-operating mechanism; Fig. 2, a thereby interrupted, the toes are, owing to perspective view, on a larger scale, of part of the connections described, elevated so as to said alarm-operating mechanism; Fig. 3, a project into the path of the arm f of the valve, view showing the alarm mechanism applied whereby when a locomotive approaches the to a locomotive, and Fig. 4 an enlarged secswitch in either direction the valve will be '75.- tional view of part of said alarm mechanism. operated and the alarm sounded, so as to notify Extending from the steam-dome or other the engineer of the condition of the switch, portion of the steam-space of the locomotive the construction of the valve being such that is a pipe, a, which is carried down to a point the alarm is sounded, whether the locomotive 3o beneath the locomotive and close to the roadis running head-on toward the switch or is 8o bed, where it is provided with an abrupt bend, backing toward the same. and is then continued upward to a point above The availability of my invention will be the foot-board of the locomotive, where it is readily recognized when the fewness and simfurnished with au alarm-whistle, as, of the plicity of the parts composing the same and usual or any desired construction. the readiness with which they can be applied 8 5 In the bend of the pipe is a valve-casing, I), to existing engines and switches are considthe valve d of which has two passages, y, as ered. shown in Fig. 4, these passages being such I claim as myinventionthat when the valve is in the position shown 1. The combination of a locomotive-engine,

.to in said gure the flow of steam through the a pipe communicating with the steam-space 9o same is cut off; but by moving the valve of the boiler and having a whistle, and an slightly in either directionsay to the extent alarm-valve provided with ports or passages, of about one-eighth of a turn-communication substantially as set forth, whereby the iiow of is opened through said valve, and steam is persteam to the whistle is permitted by movemitted to iow to and sound the whistle. The ment of the valve in either direction from a 95 valve has two projecting arms, c and f, the central or cut-off position, said valve having arm e being provided with a rod, g, having an operating arm or inger to be actuated dian operating handle or lever in the cab of the rectly by contact with a toe on the track, all engine, so that the valve is under the direct substantially as specified.

5o control of the engineer, and can be operated 2. The combination of the switch and its 13o operating mechanism, the pivoted toes h, lo In testimony WheIeOfha-ve signed my name 1o cated ab a distance fromthe switch on, each to this specification in the presence of two subside of the same, the bell-crank levers m, the serjbing Witnesses. three-armed lever p, one arm of which is eonl: nected to the switehoperating mechanism, ROBERT S. BELISLE.

and rods n and i, whereby the other arms of said level` p are connected to the levers m, and Titnessesr said levers are connected to the toes h, al1 sub- JOHN E. PARKER, stantially as specified. y HARRY SMITH. 

